Logic Masters Deutschland e.V.

The Puzzle Portal

Please note: The creation and use of multiple accounts is not desired in the Portal. (Exceptions are only permitted for technical reasons or with the consent of the association Logic Masters Deutschland.) We reserve the right to block users who violate this rule.

The puzzle portal is a collection of puzzles created by puzzle enthusiasts from all over the world. At the moment the portal contains 29588 puzzles.

If this is your first visit to the puzzle portal we recommend that you take a tour to get an overview of the portal contents.

We have put together a collection of puzzles suitable for beginners. These contain solution hints - and we hope that these puzzles will help you getting started.


To help you getting started navigating the portal we have put together some puzzle collections.

Puzzle typesPuzzle collectionsPuzzle authors
Sudoku Easy and nice Richard
Slither link Average and nice Luigi
ABC-tje Difficult and nice berni
Pentomino puzzles Often solved and nice
Mystery puzzles

10-in-9 (Variant) 159 (Variant) A 38 ABC Box ABCtje Achtelwenden Akari Anglers Anti-Diagonal (Variant) Anti-Factor Lines (Variant) Anti-Knight (Variant) Anti-Queen (Variant) Aquarium Arrows Arrows (Variant) Battenburg (Variant) Battlefield (Variant) Battleships Between (Variant) Binairo (Variant) Brick Wall Broken 159 (Variant) Candles Carpet (Variant) Castle Wall Cave Chaos Construction (Variant) Clone (Variant) Compass Compass (Variant) Congruence Loop Consecutive (Variant) Consecutive Pairs (Variant) Coral Country Road Cross the Streams Crossword Puzzle Diagonal (Variant) Difference (Variant) Disjoint Groups (Variant) Distance (Variant) Dominion Domino Search Dots (Theme) Double Trouble (Variant) Earthquake (Variant) Easy as ABC Entropy (Theme) Equality Even/Odd (Variant) Extra Regions (Variant) Fibonacci (Theme) Fillomino Fortress (Variant) Friendly (Variant) Galaxies Geradeweg German Whispers (Variant) Greater Than (Variant) Hakyuu Hashiwokakero Heyawake Hitori Irregular (Variant) Japanese Sums Kakuro Killer (Variant) Knight Move (Theme) Kropki Kropki Pairs (Variant) Kuromasu Kurotto Landvermessung Laser Letter Puzzle Lighthouses LITS Little Killer (Variant) Lockout Lines (Variant) Logical Magic Labyrinth Magic Square Magnets Masterword Masyu Mathrax Maximum (Variant) Mid-loop Minesweeper MinMax (Variant) Modifier Cells (Variant) Moon-or-Sun Nanro Neighbours Non-Consecutive (Variant) Non-Touching (Variant) Nonogram Norinori Number Link Nurikabe Nurimisaki Outside (Variant) Palindrome (Variant) Parity (Theme) Parity Party (Variant) Pathway (Variant) Pentominous Pentopia Position Sums (Variant) Primes (Theme) Product (Theme) Products Pyramid Quadruple (Variant) Quattroquadri (Variant) Railroads Ratio (Variant) Ratio Pairs (Variant) Region Sum Lines (Variant) Regional Sums Remote (Variant) Renban (Variant) Roller Coaster Roman Numerals (Variant) Roman Sums Rossini (Variant) Samurai (Variant) Sandwich (Variant) Sashigane Shakashaka Shikaku Shimaguni Skyscraper Clusters Skyscrapers Slingshot (Variant) Slitherlink Smashed Sums Snake Snake (Variant) Star Battle Sudoku Suguru Tapa Taxicab (Variant) Tents Thermo (Variant) Thermometers Umbrellas Underground Urnenrätsel Variables Tapasyu Windoku (Variant) X-Sums (Variant) XV (Variant) XV Pairs (Variant) XY-Differences (Variant) Yajilin Yin and Yang

Enjoy browsing the portal!

If you are interested in the recent growth of new puzzles, see the discussion in our forum (scroll down to see comments in English).

The easiest puzzles

DescriptionsolvedRating
unsolvedRose Puzzle 1
by RailMan (on 13. June 2025, 15:45)
4181
79 %
unsolvedLook At What You're Saying
by PhoenixAki (on 9. April 2025, 10:04)
5171
77 %
unsolvedQuad V 4x4
by iceypop3444 (on 10. August 2025, 03:28)
2341
72 %
unsolvedSpeedy logic
by Azure (on 6. April 2025, 12:24)
4921
70 %
unsolvedspeedrun sudoku
by Tis_Me_Alex_B (on 6. March 2024, 17:39)
9931
63 %

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The most beautiful puzzles

DescriptionsolvedRating
unsolvedRundweg Family Photo
by pokerke (on 14. February 2011, 00:57)
825
100 %
unsolvedWichtel 2016 (2): Erfahrener Höhlenforscher gesucht
by wichtel (on 20. April 2017, 11:02)
503
100 %
unsolvedDie Kryptos - S02E06: Summenbild Rundweg / Sudoku
by tuace (on 16. March 2018, 15:10)
415
100 %
unsolvedJapanische Höhle mit Irrwisch von den Außerirdischen (2)
by ibag (on 20. April 2018, 00:00)
405
100 %
unsolvedGlückwünsche vom Orion
by Statistica (on 9. July 2019, 00:55)
254
100 %

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The newest puzzles

DescriptionsolvedRating
newDeeper Motion (Antiknight Region Sum Lines)
by Florian Wortmann (today, 19:25)
12
N/A
newTenban
by chrisjnap (today, 17:51)
53
N/A
newNumbered Rooms Tessellation
by Crusader175 (today, 17:00)
43
N/A
newColours in the (k)night XII
by Villse (today, 16:57)
22
N/A
newAggregate
by Prof.Dori (today, 15:52)
63
N/A

Show complete list

Latest

New commentsLast solved

Classic Sudoku 2 (today, 19:51 by bansalsaab)
Sorry 2* for me too. But not to take away from beauty of the puzzle. May be...

Deeper Motion (Antiknight Region Sum Lines) (today, 19:40 by jalebc)
code?

Diophantine Equation (today, 19:21 by clock)
@sanabas
We have 3^n = a^3 + 1=(a+1)(a^2-a+1).
So let a=3^m-1, where...

Classic Sudoku 1 (today, 19:04 by Piatato)
Excellent! Cool trick and a smooth solve!

Classic Sudoku 2 (today, 18:52 by Piatato)
Beautiful! Really clean construction, great fun to solve! :)

Serendipitous (today, 18:50 by TheGrand547)
Devious but never unfair

I forget what 8 was for (today, 18:46 by marcmees)
great puzzle. leaving out 8 makes for some nice logic dynamics. Thanks

Boilerplate (today, 18:36 by Zibl)
Lovely puzzle, thank you!

Tenuity (Japanese sums/Pentomino chain) (today, 18:26 by Piatato)
Thanks a lot for this great gift! I had a lot of fun solving it :D

La Mer (today, 18:22 by chubnatty)
Really enjoyable logic, though my brain was fighting me for the first 10...

today, 19:52
Exit Stage Left (Anti-Knight, Thermo) by jnmh

today, 19:51
Circular Reasoning by arda

today, 19:51
Silent Little Killer Tessellation by Photyne

today, 19:50
Sweepin' Around by greemi01

today, 19:50
Killing it 1 to 9 by SeveNateNine

today, 19:50
Fishing Pentominoes by trashghost

today, 19:49
Serendipitous by cmigas

today, 19:49
Broken Beaded Bracelets by madlil

today, 19:48
Little Renban Killers by koba1917

today, 19:48
Classic Sudoku 2 by bansalsaab

Show complete list

Show complete list


87 users were active in the last 15 minutes (number of solved puzzles in the last 24 hours in brackets):
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